Wrench



C. SENN WRENCH Filed April 6. 1925 3 Sheets-Sheet 1 lnaentor Nov. 8,1927;

I c. SENN 1,648,661

WRENC H Filed April 6, 1925 3 Sheets-Sheet 2 Jnaentor fgmt'ornegsPatented Nov. 8, 1927.

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Application filed April 6; 192 5. Ser ia1-'I To. 20,881. Y

This invention relates to a wrench andparticularly to that type whichemploys a flexible gripping member.

The object of the present invention is' to generally improve andsimplify the construction and operation of the wrenches described; toprovide a flexible gripping me1nher in the form of a chain, a flexiblesteel band or the like which is adapted tofcon pletely encircle theobject being gripped and turned; and to provide in conjunction an opeiating lever and a gripping jaw whereby. the flexible grippingm'em-bern'iay be tightened or released; to provide means whereby theflexible gripping member may b'eshortened or lengthened'to snuglyencircle pipes, caps, tubes, etc. of varying diameter; and further toprovide a structure whereby a uniform pressure is. exertedup'on theflexible gr1pping member at all points when applied,

The invention is illustrated by way of eX- 1 ample in the accompany ngdrawings, 1n

which: I

.Fig. 1 is a plan View in section showing one form of the wrench, thisform being particularly employed as a cap jvrench for removing screwcaps from fruit Jars and the like.

Fig. 2 is a side elevation of the section. Fig. 3 is a detail sideelevation showing the manner of attaching the flexible gripping member.

Fig. 4 is a perspective view of the gripping jaw.

Fig. 5 is a plan view in section showing the modified form of the wrenchillustrated inFig.1.

Fig. 6 is a central vertical section. taken on line 66 of Fig. 5.

Figs. 5 and 6.

8 is a section taken on Fig. 5. y

Fig; 9. is a perspective view of the steel band gripping device employedin conjunc- Of Fig. 10.

Fig. 7 is a perspective view of the gripping jaw employed 1n the wrenchshown in Fig. 13 is Fig. 10.

Referring to the drawings .in' detail, particularly to Fig. 1, .Aindicates a handle member or lever which ingthis instance is constructedin two sections as indicated at 2 and 8, the handle'beingyin otherwords, .d=ivided longitudinally..- These longitudinal asection taken' online 13-13 ofsections are secured together by-rivets shown 7 The innerend of the handleis enlargedto I form a head member generally indicatedat l3. Thesides and inner-face Of thQJlIGRCF nien'ibenis open and thespace formed between the upper and lower sid'e'sof the head memberservesthe function ofa pocket or. I

receptacle fora'gripping jaw?) which, is perhaps best illustrated in Fig. 4; Passingthrough the upper and lower sections of the head member 13and secured between the ame area at 6 and 7. o

The gripping j aw is provided with a front face 5 and side sections 8and 9. These side sections are recessed as indicated at 101O and-1l-1l.The recesses 10 engage the pin 6 while the recesses 11 engage the pin 7.A pin or rivet is secured between the sidesections 8 and 9, as indicatedat 12, anda spring 13 connects this pin with the rivet 4C, the springserving the function ofpreventing accidental removal. of the grippingmember 5,. and also serving the function of retaining the recesses 10 10and1l-1l in engagement with the pins 6 and 7. The ends of the grip pingjaw are open, as shown in Fig-hand a flexible gripping member in thefornof a steel band, such, as shown at 14, may, thus be employed and may besecured to the pins 6 and 7. The ends of the steel band pass through theopen endsof thegripping jaw 5.

They-are then passed around the respective pins 6 and 7, andare thenfolded back on themselves and riveted or otherwise secured, as indicatedat 15. I 1

The wrench shown in Figs. 1 and 2 is particularly designed for removingscrew caps 16 from fruit jars or the like; sucha gener-' ally indicatedatC. Most, fruit jars in use,

whether quarts 0r pints, employ the same sized cap and adjustaibilityofthe band l l is therefore unnecessary. If acap istobe removed. the bandis merely slipped over the end of the cap so that it assumes theposition shown in Fig. 2. If it is desired to tighten the cap, lever Ais swung in the di-- pair of pins generally indicated v,

, ployed as indicatedatf) (see Fig. 7).

i'ection of'the arrow .'a.. Such swinging movement causes thelever toswing about the pin 7 The pin 6 swings away from the gripping jaw andthe recesses 10, and the band 1d is thus tightened and grips the screwcover. The shoe 5 is at the same time forced against the cover and auniform pressure is thus exerted around the entirepe-J riphery of thecap and is thus readily tightened.

If the cover is to be unscrewed, lever. A

is merely swu'ngin the oppositedirection.

Itwillthen swingwabout the pin 6 and the recesses 10 and pin 7 will moveaway from the recesses 11, .thus again tightening the band 14: and atthesame time applying pressure to the gripping shoe 5. The wrench is thusoperable in either direction andthe same results are obtained. g Whereadjustability oi the flexible gripping member 14 is required, the typeof Wrenchsuch asshown in Figs. 5 an'd6 is employeds' The same grippingshoe is emsame type of'handle A is employed; lThe pin-s6 and 7 are used;In fact, there isno difference in construction, except that means areemployed for shortening or lengthening the loop formed bythe steel band14.

- This is accomplished by pivoting a member 17 on pin 7, as shown inFigs. 5 and 9. This niemb-er'cari'ies a cam 18 which swings abouta pin19. This member also carries an operating lever 20 which engages the cumI 18. j A coil spring surrounds the pin 19, as

at 21 and this spring serves the function o1 normally turning the caminto gripping engagement with thesteel band 1 1: which is releasedposition. The free end of the band interposed between the cam and theinner face 22 of member 17. l/Vith the cam in looking position, theextension or shortening of the band 14 cannot take place.

Hence, it it is desired to lengthen or short en the band, it is merelynecessary to depress the lever 20, so thatthe cam is swung to a tightenor release theband ld is therefore thought unnecessary. V

A further modification of the wrench is sli'ownin'Fig. 10. Inthisinstance a lever in the form of arod is employed, as indie cated atD. The head member consisting of two plates and .31, are rivetedorbolted to the rod, as li ltllcfiited ilt 32. Pin-s are passed through.and securedin tliehead sections 30 and 31, as indicated at 6 and 7 and agripping jaw is secured between the head sections as indicatedat 33.This grlpping jaw is practically seating identically to the jaws shownin Figs. & and 7, the only difference being that the outer face is flat,as -.,shown at 3 L: .Th-e jaw is secured between the head sections by aspring and its.

operationiis identical to the otherlwrenches.

The chain indicated at F,"1which formsthe flexible gripping member inthis instance,

is permanently secured at one end to the pin 6, audit is adjustablysecured to a toggle arm which in this instance forms a part of the pin7". The out-erendfof'the toggle arm is forked, asshow n at i'ifi Theinner faces of the block are grooved asfat 37, and pockets are formed.at the bottom thereof as at 38, which are adapted to receive the pins39 -0I1Itl16 chain yThfat is, the chain is provided with pins'whichare-sufficiently long to project, as shown at 39fl see particularly Fig.13). The pins are dropped into the recesses 37 and pockets 3 8, and thechain may thus be lengthened or; shortened as desired.

The chain wrench israther substantial in.

construction, as it is employed for heavy duty worlnand it is for this'rea'son that a handleof special constructionis employed. Otherwise, itoperates the same as other wrenches and also includes, the same adjust,

ability as shownin Fig; 5.

VVhileI have shown the preferred forms of my invention as "now knowntome, I wish it understood that various changes may be made in itsconstruction without departing from the spiritotthejinvention as defined in the appended claims.

Havingtlius described my invention, what I claim and'desire to secure byLettersPat-;

ent is: u j 1. A wrenchoomprisinga handlefla head on one end thereof, apair of interspaced fulQ cruni members on the head, a jaw attached tothehead, a pair otinterspaced bearingf members on the jaw andnormally1naintained in engagement with tlierespectivefulcrum' members, saidbearing menibe-rsforming pivotal supports for the fulcrum mom-- bers topermit the handle and head to pivot. and swing with relation to eitherbearing .member and the jaw, and a flexible gripping member adapted toencircle an object to be gripped and having two ends attached to thehead.

2. A wrench coinprisinga handle, ahead on one end thereof, a pair of'interspaced fulcrum members on the head, a j aw attached to the head, apair of interspaced bearing members on the jaw and no rmally inaintained' in engagement with the respectivefulcrum members, said bearingmembers toi-ming pivotal supports "for the fulcrum crum members,

members to permit the handle and head to pivot and swing with relationto either bearing member and the jaw, a flexible gripping member adaptedto encircle an object to be gripped, said flexible gripping memberhaving two ends and means securing the ends of the flexible grippingmember to the respective fulcrum members.

3. A wrench comprising a handle, a head on, one end thereof, a. pair ofinter-spaced fulcrum members on the head, a jaw attached to the head, apair of interspaced bearing members on the jaw and norn'rally maintainedin engagement with the respective fulaid bearing mei'nbers formingpivotal supports for the fulcrum members to permit the handle and headto pivot and swingwith relation to either bearing member and the jaw, aflexible elongated gripping member adapted to encircle an object to begripped and having one end at.-

tached to one of the fulcrum members and disposed between the plates andhaving re-.

cesses formed therein engageable with the respective fulcrum pins, andan elongated flexible gripping member adapted to encircle a device to begripped, said flexible member having two ends, and said ends beingattached to the fulcrum pins.

5. A wrench. of the character described comprising a handle section, ahead on one end thereof, said head consisting of a pair of int-erspacedplates, a pair ofpins interposed between the plates and separated withrelation to each other, said pins forming independent fulcrum membersabout which the head and handle may be swung, a jaw disposd between theplates and having recesses formed thereinengageable with the respectivefulcrum pins, a. spring attached to the aw at one end and to the handleat the opposite end and normally maintaining the jaw in engagement withthe fulcrum pins, an

elongated flexible gripping. member adapted to encircle an object tobeg-ripped, said flexible member having two ends, and a pivotalconnection formed between said ends and the fulcrum pins.

6. A wrench of the character described comprising a handle section,ahead on one end thereof, said head consisting of a-pair of interspacedplates, a pair of pins inter? posed between the plates and separatedwith relation to each other, said pins forming independent fulcrummembers about which the head and handle may be swung, a jaw disposedbetween the plates and having recesses formed therein engageable withthe respective fulcrum pins, a spring attached to the jaw one end andtot-he handle at the opposite end and normally maintaining the jaw. inengagement with the fulcrum pins, an elongated flexible steel bandadapted to encircle an obj ectto be gripped, said steel band being pivotally secured at one end to one of the fulcrum pins, and means for adjust-ably securing the other end of the steel band to they other fulcrumpin.

CARL snare

